Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27d54540192e611…

MALICIOUS

PDF

67.6 KB Created: 2020-12-03 16:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 79ac579605c66310e2bc761b2fad4d45 SHA-1: 89ff5952064d7fd03351c89d96806deb974ba81d SHA-256: b27d54540192e611f92a627bcfc5780ae185c7b1d9a919b27d3acb09c1192568
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing or redirection campaign. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure ('traffmen.ru'). The document also leverages disposable hosting and link farms, suggesting an attempt to obscure the final malicious destination. No scripts were extracted, but the presence of multiple malicious links indicates a strong intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9697

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=blackberry+passport+whatsapp+apk In PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/76560270a.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/514ff4a4d.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/zekop.pdfIn PDF document text
    • https://rujemadatidugu.weebly.com/uploads/1/3/4/7/134747735/xapasoruf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5fb8814f60047.pdfIn PDF document text
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/0ceb11e8.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/3615315.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/jafupebutobur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/lean_in_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bf9f2e34347c70560205/t/5fc7e74e71c9f03b84729896/1606936399059/smash_2_download_dolphin.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/sustainable_agriculture_in_hindi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBA 5100 bytes
SHA-256: 678a9e64205a3fbe09f78d50038a204b7bfea9bbeddf5ddf23750d4c817b69cf
font_01_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 11100 bytes
SHA-256: 4a18372b95286462d25c29eb63c442a933d8cbd113f3ec1acd7564dd34a57d6b